Bible Dictionaries
Dynactinometer

Webster's Dictionary

(n.) An instrument for measuring the intensity of the photogenic (light-producing) rays, and computing the power of object glasses.

Bibliography Information
Webster, Noah. Entry for 'Dynactinometer'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​d/dynactinometer.html. 1828.